[alblogg]

Man I don't know if it will help but I thought I would throw it at you anyway because it about drove me crazy before I finally took it to a buddy of mine that been doing transmissions for about 30 years to figure out and I never would have thought that would have been the problem. I had a '01 Malibu 3.8 would not change out of first into second until you let completely off the gas then it would change gear. I though it was the sensor took it to him he hooked it up on his scanner no codes he took it to the Chevy dealer it was a plugged catalytic converter. It was building up to much back pressure so I got out of trans work and just had to slap on a CAT now she runs and shifts like a dream.